Inking roller for printing presses



May 18, 1943 H. J. LUEHRS INKING ROLLER FOR PRINTING PRESSES Filed April 12, 1941 2 Sheets-Sheet l IN VEN TOR.

y 1943 H. J. LUEHRS -INKING ROLLER FOR PRINTING PRESSES Filed April 12, 1941 2 Sheets-Sheet 2 I IN V EN TOR.

Patented May 18, 1943 mama Roman FOR ram'rmc rnnssns um I. Luehrs, Westerly, a. 1., assignor to c. a.

' Cottrell a Sons Company, Westerly, B. -I., corporation of Delaware Application April 12, 1941, Serial No. ssazis 4 Claims. (Cl. 101-367) My invention consists in a novel inking roller which may be used in connection with various types'of inking mechanisms for printing presses, said inking roller being hollow and adapted to contain a supply of liquid ink and having a pervious side wall of hard material such as pervious bronze through which the liquid ink may pass outwardly to the exterior surface of the inking roller to be transferred either directly or indi- -rectly,as may be desired, to the form cylinder of a printing press. Pervious bronze suitable for the purpose hereinafter set forth is in extensive commercial production by different manufacnames such for instance as Oilite, Durex, and Ledaloyl.

'turers and it is marketed under various trade My invention also comprises means for feeding the liquid ink, preferably under pressure,'to

the interiorfof the inking roller. 7

My invention comprises :a pressure regulator for the interior of the inking roller to obtain the best results in the e of the liquid ink to the exterior of the roller and the transfer therebyin regulable quantities.

Practical embodiments of my invention are represented in the accompanying drawings, in which Fig. lrepresents one form of inking roller in longitudinal central section, the means for feeding the liquid ink under pressure being shown in side elevation;

Fig. 2 represents the inking roller in cross section, in a position to transfer the liquid ink directly to alarm cylinder;

v Fig. 3 represents another form of inking roller in longitudinal central section; and

Flg.-4 represents the inking roller in cross section in a position to transfer the liquid ink indirectly through intermediate rollers to a form cylinder.

In the form shown in Figs. 1 and 2 the hollow inking roller is shown as having an inner .perforated cylindrical side wall I and an outer concentric side wall 2 in the form of a pervious sleeve of hard material, as, for instance, pervious bronze, removably positioned on the inner side wall between removable collars I and 1. This I perforated innerside wall I of the inking roller is provided with hollow trunnions I and s which are removably and rotatably mounted, as. by anti-friction bearings I and l, in the side frames 0 and II respectively of the The means which I have shown for feeding liquid ink under pressure into the interior of the inking roller comprises the following elements:

A bracket ll carried by' the side frame ll supports a liquid ink supply tank It. A liquid supply pipe li leads through a rotary joint ll to a cap ll which removably closes the open end of the trunnion 0. I'br feeding the liquid ink under pressure to the interior of the inking roller the tank it maybe provided with a hand pump it. A pressure gage i'l may-also be provided for thetank 12. A pressure regulating .valve is may be provided in the cap is which removably closes v instance pervious bronze which is removably secured to ends 2| and 22, which ends are provided with hollow trunnions 23 and 24 which are removably and rotatably mounted, as by the anti-.- friction bearings I and 8 in the side frames 9 and II' respectively of theinking mechanism. The means for feeding the liquid ink under pressure into the interior of the inking roller may be the same as that shown with respect to the form shown in Fig. 1 and the pressure regulating valve is and its cap is may be the same as that shown in Fig. 1. In the form shown in Fig. 3 it will be noted that the perforated 'inner wall and the sleeve retaining collars shown in Fig. 1 are omitted.

In cases where the inking roller directly transfers the ink to the form cylinder, as shown in Fig. '2, it may be advisable to provide a doctor the inking rollerwill increase as the rotative inking mechanism.

speed of the roller is increased, thereby allowing more ink to pass through the pervious side wall of the roller as the press speed increases.

The inking roller illustrated in Figs. 3 and 4 and described butnot claimed herein, forms the subject matter of my divisional application iiled October 31, 1942, Serial No. 464.015.

It is evident that various changes may be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope of my invention, and hence I do not intend to be limited to the particular embodiments herein shown and described, but what I claim is:

l. A hollow inking roller adapted to contain a supply of liquid ink and having rotary inner and outer side walls. the inner side wall being perforated and provided with hollow trunnions and the outer side wall being of pervious hard material, means for removably positioning the porous outer side wall on the inner side wall, and means for feeding liquid ink underpressure to the interior of the roller.

2. A hollow inking roller adapted to contain a supply of liquid ink and. havingrotary inner and outer side walls, the inner side wall being perforated and provided-with hollow'trunnions and the outer side wall being of pervious hard material, means for removably positioning the porous outer side wall on the inner side wall, means for feeding liquid ink under pressure to the interior of the roller through one hollow trunnion, and a pressureregulating valve in the other hollow trunnion.

.a. a mum mun roller sums to contain am] of liquid ink and having rotary inner and outer side walls, the inner side wall being perforated and provided with hollow trunnions 20 other hollow trunnion.

and the outer side wall being of pervious bronze. means for removably positioning the porous bronze outer side wall on the inner side wall, means for feeding liquid ink under pressure to the interior of the rollerthrough one hollow trunnion, and a pressure regulating valve in the HANS J. LUEHRB. 

